AISI4145H钢退火工艺研究
The Research on the Annealing Process of AISI4145H Steel
王萍,王一谦，李佑河
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作者单位：安徽工业大学
中文关键字：AISI4145H钢；退火；黑匣子；硬度
英文关键字：AISI4145H steel; annealing; black box; hardness
中文摘要：本文通过黑匣子装置测试退火炉中Φ150mmAISI4145H钢棒料退火的温度分布规律，了解在不同装炉位置试样的升温和冷却速度变化规律。以及在实验室模拟AISI4145H钢在650℃到740℃之间，不同退火工艺对其组织及硬度性能的影响。实验结果表明：AISI4145H钢在退火工艺为740℃保温1h后空冷，试样组织为铁素体+粒状珠光体和少量细片状珠光体、其硬度值为HRC21.2，满足工业切屑加工生产需要。该退火工艺采用坑冷的冷却方式，提高了退火冷却速度，退火冷却时间为10h，缩短了工件在炉时间，有效地提高了生产效率，降低了生产成本。
英文摘要：This paper test the online distribution of annealing temperature about Φ150mm AISI4145H steel in the furnace with black box, and laboratory simulation AISI4145H steel between 650℃and 740℃,the properties to the microstructure and hardness by different annealing process. The results show that: the annealing process with the heating at 710℃ and keeping 1 h and cold in air，the microstructure is ferrite + granular pearlite and little lamellar pearlite and the hardness value is HRC 21.2, meeting the needs of industrial processing chip. The annealing process shortened the time about the workpiece in the furnace by increased cooling rate of annealing ,cooling using cold pit and the cooling time is 10 h ,effectively increased production efficiency, and reduced the production costs。